Oil well pump



2 Sheets-Sheet l 2,1, 1934:m w. A. MCGREGQR OIL WELL PUMP Filed Dec. l5,1932 Aug. 2l, 1934. w. A. MCGREGOR OIL WELL PUMP Filed Deo. 15, 1932 2sheets-sheet 2 l Patented Aug. Z1, 1934 sra ves PATENT inviare FFQ lVlyinvention is an improvement in oil'well pumps of that generalconstruction in which a valved plunger works in a barrel forming asection oi the tubing extending to the bottom of the 'J well andprovided its lower end with a standing-valve through which the oilpasses into the ltubing and barrel on the upstroke of the plunger and isforced through the valved upper end of the plunger on the down stroke ofthe forni construction ci standing valve which permits sand that mayenter the tubing with the oil to pass below said standing' valve into asand trap at 4he lower end oi the well tubing.

With these principal objects in view iny invention consists in theimproved construction of oil well punip hereinafter fully described, andwhat I claim as new and desire to protect by Letters Patent is morespecifically set forth in the appended claims.

In the drawings:-

Figure 1 is an elevation of my improved con- V Vstruction or pump.

Fig. 2 is a vertical longitudinal section through the same.

3 is an enlarged detail sectionalview of the barrel and couplingsconnecting the sainel with. the adjoining well tubing.

Fig. is a similar sectional View including the cooperating parts of thepump. i

Fig. 5 a details ctional view of a reversible vaived body used inconnection with the plunger. Fig/G is a detail View of one of thecouplings 'between the pump barrel and tubing.

Fig. 7 is a detail viewoi a pipe section of the well tubing adapted toforro a seat'for a drop valve, and

Figs. 8 and 9 are detail sectional views oi my improved form ci standingvalve.

In carrying out my invention a section of the well tubing is in theforin of a cast iron barrel 10, the cylindrical wall oi which iscomparatively thick and tapered externally at both ends where they arethreaded, at 11, to engage correspondingly threaded openings incouplings 12 and 13 for connecting said barrel to the well tubing ofwhich itiorrnsa section, the coupling 12 in addition to the taperedthreaded opening 14 having a straight threaded opening 15 at theopposite end thereof to receive the well tubing 16 above the barrel withan internal shallow flange 17 forining opposite shoulders against whichthe ends of the barrel 1G and tubing 16 abut when these parts arecoupled together. A similar coupling may be employed for connecting thelower end of the barrel to the well tubing, 18, instead of the coupling13 wherein the tapered threaded opening 19 in the upper end thereofjoins the straight threaded opening 2i) in the lower end. In addition tothe flange 17 the coupling 12 is roamed, as at 12o, immediately abovethe thread 15 for convenience in connecting the tubing to this coupling.l

A hollow plunger 21 works in the barrel 10 and is of such length withrespect to the length ci said barrel that it projects into the tubing 16on the upstroke and into the tubing 18 on the down stroke, and in orderthat there will be a clearance around the plunger when it moves ineither direction beyondv the barrel said tubings 16 and 18 are oislightly greater internal diameter than .1e internal diameter of thebarrel `(see Figs. 3 and 4) so that'the oil which is forced up the welltubing in the operation of the pump will wash off the outside oi theplunger keeping it clean and well oiled and preventing it from stickingas well as reducing the wear to a mini mum. The plunger isinternallythreaded at both at 22, to receive a check valve, such as shown in Fig.a, and although I have illustrated the plunger as being provided with acheck valve at the upper end only it will be understood that additionalcheck. valve may be used at the lower end; in either instance howeverthe said plunger is reversible in the barrel so as to distribute thewear by reversing it.

The check valve threaded in the upper end of .the plunger is in theforni oi aball-valve, the

body portion 23 being externally 'threaded at its opposite ends forconnection with the internally threaded end ofthe plunger Z1 and toYreceive the cage 24 which confines the ball 25, with a reversible valveseat 26 interposed between the inner end oi the cage and outer end ofthe valve body. As will be noted by reference to Figs. 4 and 5 the valvebody is reversible, for which purpose an annular recess 27 is providedat each end of said body portion to receive the ordinary form ofreversible valveseat shown. The ball of this check Valve closesdownwardly so that the oil will be lifted in the well tubing above theplunger on the upstrolre of the latter and opens automatically bypressure oi the oil on the down stroke of the plunger.

The pipe section 18 of the well tubing Iinto which the plunger projectsfrom the barrel on the downstroke may be of any desired length toaccommodate the length of stroke of the plunger, and to the lower end ofthis pipe section there is so? l connected by coupling 28 acomparatively short pipe section 29 serving in the present instance as aseat for a drop valve (not shown) which is to be used as an auxiliary tothe regular standing valve. In order that the drop valve may packclosely in this pipe section or seat 29 the cylindrical wall thereof isthicker than the wall of the pipe section 18 above the same to decreasethe internal diameter, and the upper end of said seat is beveledinwardly, as at 30. Into the lower portion of this pipe section or seatprojects the upper portion of a standing valve 31, hereinafterparticularly described, which supports the drop valve when it is loweredinto the well tubing, said standing valve being supported by a pipesection 32 connected by coupling 33 to said pipe section 29, and intothe lower end of this las.J mentioned pipe section is threaded an anchorconsisting of a pipe 34: closed at its lower end by a plug 35, saidanchor forming a sand trap in association with the standing valve.

For maximum efficiency in the operation of the pump employ astanding-valve of a particular construction comprising a tube 36 locatedcentrally within the pipe section or casing 32, leaving a spacesurrounding said tube which communicates with the oil well by inletports 37, 37 in the form of short tubes or integral nipples 38 extendingbetween the body portion and wall of the pipe section or casing carryingthe same, it being noted by reference to Figs. 8 and 9 that the parts32, 36, and 38 are integral, that is, this part of the standing-valve isa casting and the surrounding wall of the pipe section or casing iscomparatively thick. The tube 36 extends a short distance below theshort tubes or nipples 38 and is closed at its lower end forming ashallow trap, and the upper end of said tube is externally threaded forthe connection thereto of a cage 39 confining the ball 40, with anordinary form of reve `sible valve-seat ll interposed between the andend of the tube. By this construction of standing-valve the tubecarrying the valve at its upper end is rigidly supported in the pipesection 32 with a space surrounding the same so that sand which mayenter the well tubing above the valve will gravitate into the lower pipesection or anchor pipe and. be trapped therein.

rlhe pump mechanism hereinbefore described o-perates after the manner ofa plunger pump, that is to say, oil is drawn through the standingvalveat the lower end of the well tubing on the upstroke of the plunger atwhich' time the ball valve at the upper end of the latter is closed, andwhen the well tubing below the raised plunger, as well as the plungeritself, is filled with oil the down stroke will cause the oil to closethe standingvalve and the liquid confined below the plunger will beforced upward through the same out of the valve at the upper end thereofinto the well tubing to be lifted on the upstroke of the plunger. Theplunger rits closely within the bore of the barrel and in the operationof the same the end portions thereof moving into the pipe sections 16and 18 having larger bores will be washed of sand and grit by the oilsurrounding said end portions thus reducing wear, and as the plunger isremovable from the well tubing it can be reversed when desired, in whichinstance the ball valve 23 is transferred from one end to the other.During the operation of the pump the sand will gravitate past thestanding valve at the sides thereof into the sand trap below the tubularcasing 32, and it will be understood of course that the pipe sectionforming the sand trap or anchor is tightly plugged at its lower end forthe required suction created by the plunger in drawing the oil into thewell tubing and barrel, and should the standing-valve leak to such anextent as to affect the proper working of the pump it can be augmentedin the customary manner by Withdrawing the plunger and inserting adrop-valve which will rest on the beveled upper end of the pipe sectionor seat 29.

From the foregoing it will be obvious therefore that the arrangement ofpump mechanism forming the subject matter of this application provides avery substantial arrangement, and the life of the pump is materiallylengthened by the provision of reversible parts.

I claim:-

1. A pump for oil wells comprising tubing sections coupled together, aplunger barrel forming one of said sections above a standing-valve, saidplunger barrel being of slightly less internal diameter than the tubingsectie s above below the same, a plunger working closely in the barreland into the tubing sections above and below the saine to be cleaned bythe oil in said tubing sections, and a tubing section of the well tubingintermediate the standing-valve an:A plunger barrel and below the tubingsection into which the plunger works on its down stroke, said lastinentioned tubing section having a thick cylindrical wall with inwardlybeveled ends to provide a seat member of approximately the same internaldiam eter as the working barrel to receive a drop valve fitting closelytherein; together with a standingvalve at the lower end of the tubing onwhich the drop valve rests, said standing valve consisting of a castmetal tubing section comprising a cylindrical casing forming a part ofthe well tubing, a vertical tube at the center of the casinfT leaving aspace surrounding said central tube, and short tubes extending from thecentral tube to the cylindrical wall of the casing to support saidcentral tube and provide inlet ports thereto, the upper end of thecentral tube being threaded to receive a ball-valve cage, seat, andball.

2. In combination with well tubing, barrel, and plunger, of astanding-valve consisting of a cast metal section comprising acylindrical casing forming a part of the well tubing, a vertical tubelocated centrally within the casing to leave a space surrounding thetube, and short tubes or nipples extending from said central tube to thecylindrical wall of the casing to support said central tube and provideinlet ports thereto, the lower end of the aforesaid tube being closedand the upper end thereof threaded to receive a ballvalve cage, seat,and ball.

3. In combination with well tubing, barrel, and plunger, of astanding-valve consisting of a cast metal section com, rising acylindrical casing forming a part of thewell tubing, a vertical tube atthe center of the casing leaving a space surrounding said central tube,and short tubes extending from said tubular body portion to thecylindrical wall of the casing to support the central tube and provideinlet ports thereto, the upper end of the central tube being threaded toreceive a ball-valve cage, seat, and ball; together with a pipeconnected to the lower end of the casi ing to form a sand trap below thestanding Valve, said pipe being closed at its lower end.

WILLIAM A. MCGREGOR.

